/* ==========================================================================
   layout.css - 整体布局 / 顶栏 / 左侧栏 / Tab
   ========================================================================== */

/* --- 应用主壳 --- */
.app{
  position:relative;
  width:100%;
  min-width:1440px;          /* 最小宽度 1440px：窗口更小时横向滚动 */
  height:100vh;
  min-height:900px;          /* 最小高度 900px：窗口更小时纵向滚动 */
  display:grid;
  grid-template-rows:var(--h-topbar) var(--h-tabbar) 1fr;
  background:
    radial-gradient(ellipse at top, rgba(0,102,255,.18) 0%, transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(0,229,255,.08) 0%, transparent 50%),
    var(--bg-deep);
  overflow:hidden;
}

/* 背景星空/网格层 */
.bg-grid{
  position:absolute;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(0,229,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,.04) 1px, transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse at center, #000 30%, transparent 80%);
}
.bg-particles{position:absolute;inset:0;z-index:0;pointer-events:none}

/* --- 顶栏 --- */
.topbar{
  position:relative;z-index:10;height:var(--h-topbar);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 18px;
  background:linear-gradient(180deg,rgba(6,22,52,.95),rgba(4,11,26,.6));
  border-bottom:1px solid var(--line);
}
.topbar::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,var(--c-primary),transparent);
  opacity:.7;
}
.topbar-left{display:flex;align-items:center;gap:18px}
.topbar-mid{position:absolute;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:8px}
.topbar-mid .title{font-size:22px;font-weight:700;letter-spacing:4px;
  background:linear-gradient(180deg,#fff,#7fd6ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 24px rgba(0,229,255,.4);
}
.topbar-mid .ver{
  font-size:12px;color:var(--text-3);padding:2px 6px;border:1px solid var(--line);
  border-radius:3px;
}
.topbar-right{display:flex;align-items:center;gap:14px}
.tb-time{font-family:var(--font-dig);font-size:13px;color:var(--text-2);text-align:right;line-height:1.2}
.tb-time .d{font-size:14px;color:var(--text-1)}
.tb-time .h{font-size:18px;color:var(--c-primary);font-weight:600}
.tb-weather{display:flex;align-items:center;gap:6px;color:var(--text-2);font-size:12px}
.tb-user{display:flex;align-items:center;gap:8px;padding:4px 10px;border:1px solid var(--line);border-radius:20px;background:rgba(0,40,90,.5)}
.tb-avatar{width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,#00b3d4,#7c4dff);display:grid;place-items:center;font-size:12px;color:#fff;font-weight:700}

/* --- 顶部 Tab 导航 --- */
.tabbar{
  position:relative;z-index:9;height:var(--h-tabbar);
  display:flex;align-items:center;justify-content:center;gap:6px;
  background:linear-gradient(180deg,rgba(6,22,52,.7),rgba(6,22,52,.3));
  border-bottom:1px solid var(--line);
  overflow-x:auto;overflow-y:hidden;
  padding:0 12px;
}
.tabbar::-webkit-scrollbar{height:4px}
.tabbar::-webkit-scrollbar-thumb{background:var(--c-primary);opacity:.4}
.tab{
  padding:5px 12px;font-size:13px;color:var(--text-2);cursor:pointer;
  border:1px solid transparent;border-radius:16px;transition:.2s;
  white-space:nowrap;position:relative;flex-shrink:0;
}
.tab:hover{color:var(--text-1);background:rgba(0,229,255,.1)}
.tab.active{
  color:#fff;
  background:linear-gradient(180deg,#0084b8,#00587c);
  border-color:var(--c-primary);
  box-shadow:0 0 14px rgba(0,229,255,.5), inset 0 0 12px rgba(0,229,255,.3);
}
.tab.is-home::after{
  content:"";position:absolute;top:2px;right:2px;width:6px;height:6px;border-radius:50%;
  background:var(--c-green);box-shadow:0 0 6px var(--c-green);
}
.tab:not(.is-home) .dot-3rd{color:var(--text-mute);font-size:10px;margin-left:2px}

/* --- 主体：内容（无左侧栏，单列；高度由 .app grid 行决定） --- */
.main{
  position:relative;z-index:1;
  min-height:0;
  overflow:hidden;
}

/* --- 左侧栏 --- */
.sidebar{
  position:relative;background:linear-gradient(180deg,rgba(6,22,52,.8),rgba(4,11,26,.6));
  border-right:1px solid var(--line);
  overflow-y:auto;padding:14px 0;
}
.sidebar::after{
  content:"";position:absolute;top:0;right:-1px;width:1px;height:80px;
  background:linear-gradient(180deg,var(--c-primary),transparent);
}
.sb-group{margin-bottom:10px}
.sb-title{
  display:flex;align-items:center;gap:8px;
  padding:8px 16px;font-size:13px;color:var(--text-3);cursor:pointer;
  position:relative;
}
.sb-title .chev{margin-left:auto;font-size:10px;transition:.2s}
.sb-title.open .chev{transform:rotate(90deg)}
.sb-title:hover{color:var(--text-1)}
.sb-title::before{
  content:"";display:none;position:absolute;left:0;top:8px;bottom:8px;width:3px;
  background:var(--c-primary);border-radius:2px;
}
.sb-title.active{color:var(--c-primary)}
.sb-title.active::before{display:block}
.sb-items{padding-left:8px;max-height:0;overflow:hidden;transition:max-height .25s ease}
.sb-items.open{max-height:480px}
.sb-item{
  display:flex;align-items:center;gap:10px;
  padding:8px 18px 8px 24px;font-size:13px;color:var(--text-2);
  cursor:pointer;position:relative;
}
.sb-item .ico{font-size:14px;width:18px;text-align:center;color:var(--text-3)}
.sb-item:hover{color:var(--text-1);background:rgba(0,229,255,.06)}
.sb-item.active{
  color:#fff;
  background:linear-gradient(90deg,rgba(0,229,255,.18),transparent);
}
.sb-item.active::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,transparent,var(--c-primary),transparent);
}
.sb-item.active .ico{color:var(--c-primary);text-shadow:0 0 8px var(--c-primary)}
.sb-item .badge{margin-left:auto;font-size:11px;padding:0 6px;border-radius:8px;background:var(--c-red);color:#fff;min-width:18px;text-align:center}

/* --- 内容区 --- */
.content{
  position:relative;height:100%;overflow:hidden;
  padding:14px;display:flex;flex-direction:column;gap:14px;
}
.page{
  flex:1;display:flex;flex-direction:column;gap:14px;
  overflow:auto;padding-right:4px;
}
.page-title{display:flex;align-items:flex-end;justify-content:space-between}
.page-title h2{
  font-size:18px;color:var(--text-1);position:relative;padding-left:12px;
  font-weight:600;
}
.page-title h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;
  background:linear-gradient(180deg,var(--c-primary),transparent);
  border-radius:2px;
}
.page-title .sub{font-size:12px;color:var(--text-3)}

/* --- 通用卡片 --- */
.card{
  position:relative;background:linear-gradient(180deg,rgba(8,32,69,.85),rgba(6,22,52,.65));
  border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--c-primary-2),transparent);
  opacity:.7;
}
.card-hd{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 14px;border-bottom:1px solid rgba(0,229,255,.08);
  background:linear-gradient(180deg,rgba(0,229,255,.05),transparent);
}
.card-hd .ttl{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--text-1)}
.card-hd .ttl::before{
  content:"";display:inline-block;width:4px;height:14px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-deep));
  border-radius:2px;
}
.card-hd .extra{font-size:12px;color:var(--text-3);display:flex;align-items:center;gap:10px}
.card-hd .extra a{color:var(--c-primary-2);cursor:pointer}
.card-hd .extra a:hover{color:var(--c-primary);text-shadow:0 0 6px var(--c-primary)}
.card-bd{padding:14px}
.card-bd.flush{padding:0}
.card-bd.flex{display:flex;gap:14px;align-items:center}

/* --- 网格系统 --- */
.row{display:grid;gap:14px}
.row.c2{grid-template-columns:1fr 1fr}
.row.c3{grid-template-columns:1fr 1fr 1fr}
.row.c4{grid-template-columns:repeat(4,1fr)}
.row.c23{grid-template-columns:2fr 1fr}
.row.c32{grid-template-columns:1fr 2fr}
.row.c123{grid-template-columns:1fr 1fr 2fr}
.row.c223{grid-template-columns:2fr 2fr 3fr}

/* 块（card 内部区段） */
.block{
  background:rgba(0,30,80,.35);border:1px solid var(--line);
  border-radius:6px;padding:12px;position:relative;overflow:hidden;
}
.block::after{
  content:"";position:absolute;top:-1px;right:-1px;width:30px;height:30px;
  border-top:2px solid var(--c-primary);border-right:2px solid var(--c-primary);
  border-top-right-radius:6px;opacity:.5;
}